freebsd stable - Mar 2005 - cpufreq related RELENG_5 regression?

Hi,

I have the following situation here:

Box A serves as gateway for my local network and also exports some
filesystems via NFS.  The shares are mounted on box B.  Playing a movie
from one of the NFS shares on box B works fine.
When I try to transfer a file from outside the LAN to box C, which
resides inside the LAN, the movie on box B starts to stagger.

Box A runs RELENG_5, using a kernel from just before the cpufreq merge
works ok (movie doesn't stagger), a kernel from shortly after the merge
does not work (movie staggers).
Setting "performance_cpu_freq="HIGH"" in rc.conf fixes this,
so there
seems to have been a change in the defaults.

Box A is an i386 SMP machine.

Kernel config + dmesg:

http://people.freebsd.org/~brueffer/LORIEN
http://people.freebsd.org/~brueffer/dmesg.lorien

Can anyone confirm this?

BTW, there is code in sys/kern/kern_cpu.c to export the current processor
speed via sysctl, but the sysctl doesn't show up here.

- Christian

-- 
Christian Brueffer	chris@unixpages.org	brueffer@FreeBSD.org
GPG Key:	 http://people.freebsd.org/~brueffer/brueffer.key.asc
GPG Fingerprint: A5C8 2099 19FF AACA F41B  B29B 6C76 178C A0ED 982D
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url :
http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20050320/c6f496af/attachment.bin

Christian Brueffer wrote:

[...]
>When I try to transfer a file from outside the LAN to box C, which
>resides inside the LAN, the movie on box B starts to stagger.
>
[...]
>
>Can anyone confirm this?
>  
>
Anecdotally . . . I upgraded my Pentium-M laptop on Monday or Tuesday to 
the latest ... I have since noted:
- It seems to run cooler under load.  (Peaks at 140F instead of 145F)
- Watching TV occasionally has jerks, where the video will briefly lag, 
where it has not had jerks before.

It SEEMS like maybe the system is running a touch more conservatively.  
But, the difference is such that, aside from occasionally jerky video, I 
don't really notice.

-danny